Downlink control information signaling schemes for bandwidth part switching

Abstract

Different sets of downlink control information (DCI) fields may be configured for DCI that includes an indication to trigger bandwidth part switching at a user equipment (UE). For example, a UE may receive DCI that triggers the UE to switch operation from a first bandwidth part to a second bandwidth part. The UE may also identify a set of transformable DCI fields and a set of non-transformable DCI fields within the DCI. The UE may then determine updated content of the DCI for application to the second bandwidth part based on whether DCI fields are included in the set of transformable or the set of non-transformable fields. In some cases, the UE may identify a null assignment in the received DCI and may switch its operation from the first bandwidth part to the second bandwidth part based on the null assignment.

What is claimed is: 
     
       1. A method for wireless communications at a user equipment (UE), the method comprising:
 receiving, from a network device and while operating in a first bandwidth part, downlink control information (DCI) during a first transmission time interval, wherein the DCI includes an indication of a time duration beginning from a slot comprising the first transmission time interval, the time duration corresponding to a quantity of slots between a physical shared channel and a control channel that includes the DCI, and wherein the DCI includes an indication that the UE is to switch from operating in the first bandwidth part to operating in a second bandwidth part, the second bandwidth part beginning at a second transmission time interval that is subsequent to the first transmission time interval; and 
 monitoring for a physical downlink control channel (PDCCH) after the switch from the first bandwidth part to the second bandwidth part and after the time duration. 
 
     
     
       2. The method of  claim 1 , wherein the time duration comprises a quantity of symbol periods after the received DCI. 
     
     
       3. The method of  claim 1 , wherein the first transmission time interval comprises a first slot, and wherein the second transmission time interval comprises a second slot different from the first slot. 
     
     
       4. The method of  claim 1 , wherein the physical shared channel comprises a physical downlink shared channel (PDSCH). 
     
     
       5. The method of  claim 1 , wherein the physical shared channel comprises a physical uplink shared channel (PUSCH). 
     
     
       6. An apparatus for wireless communications, the apparatus comprising:
 a processor; and 
 memory coupled with the processor, the processor and the memory configured to: 
 receive, from a network device and while operating in a first bandwidth part, downlink control information (DCI) during a first transmission time interval, wherein the DCI includes an indication of a time duration beginning from a slot comprising the first transmission time interval, the time duration corresponding to a quantity of slots between a physical shared channel and a control channel that includes the DCI, and wherein the DCI includes an indication to switch from operating in the first bandwidth part to operating in a second bandwidth part, the second bandwidth part beginning at a second transmission time interval that is subsequent to the first transmission time interval; and 
 monitor for a physical downlink control channel (PDCCH) after the switch from the first bandwidth part to the second bandwidth part and after the time duration. 
 
     
     
       7. The apparatus of  claim 6 , wherein the time duration comprises a quantity of symbol periods after the received DCI. 
     
     
       8. The apparatus of  claim 6 , wherein the first transmission time interval comprises a first slot, and wherein the second transmission time interval comprises a second slot different from the first slot. 
     
     
       9. The apparatus of  claim 6 , wherein the physical shared channel comprises a physical downlink shared channel (PDSCH). 
     
     
       10. The apparatus of  claim 6 , wherein the physical shared channel comprises a physical uplink shared channel (PUSCH). 
     
     
       11. A non-transitory computer-readable medium storing code for wireless communication at a user equipment (UE), the code comprising instructions executable by a processor to:
 receive, from a network device and while operating in a first bandwidth part, downlink control information (DCI) during a first transmission time interval, wherein the DCI includes an indication of a time duration beginning from a slot comprising the first transmission time interval, the time duration corresponding to a quantity of slots between a physical shared channel and a control channel that includes the DCI, and wherein the DCI includes an indication to switch from operating in the first bandwidth part to operating in a second bandwidth part, the second bandwidth part beginning at a second transmission time interval that is subsequent to the first transmission time interval; and 
 monitor for a physical downlink control channel (PDCCH) after the switch from the first bandwidth part to the second bandwidth part and after the time duration. 
 
     
     
       12. The non-transitory computer-readable medium of  claim 11 , wherein the time duration comprises a quantity of symbol periods after the received DCI. 
     
     
       13. The non-transitory computer-readable medium of  claim 11 , wherein the first transmission time interval comprises a first slot, and wherein the second transmission time interval comprises a second slot different from the first slot. 
     
     
       14. The non-transitory computer-readable medium of  claim 11 , wherein the physical shared channel comprises a physical downlink shared channel (PDSCH). 
     
     
       15. The non-transitory computer-readable medium of  claim 11 , wherein the physical shared channel comprises a physical uplink shared channel (PUSCH).